CVE-2026-43022

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists hci_cmd_sync_queue_once() needs to indicate whether a queue item was added, so caller can know if callbacks are called, so it can avoid leaking resources. Change the function to return -EEXIST if queue item already exists. Modify all callsites to handle that.

CVSS Details

CVSS Score

5.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:6.1.120:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:6.6.51:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:6.8.9:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* - VULNERABLE

Linux Kernel (修复前版本)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

/*
 * Conceptual PoC for CVE-2026-43022
 * This demonstrates the logic of the vulnerability. Real exploitation
 * requires interacting with the Bluetooth HCI interface.
 */
#include <linux/module.h>
#include <linux/bluetooth/hci_core.h>

static int __init poc_init(void) {
    struct hci_dev *hdev;
    // Assume hdev is initialized properly
    
    // Simulate calling the vulnerable function multiple times
    // In the vulnerable version, return value handling might be missing
    int err = hci_cmd_sync_queue_once(hdev, NULL, NULL, NULL);
    
    if (err == -EEXIST) {
        // With the patch, this path is taken, preventing resource leak
        // Without patch, callers might ignore this or leak memory expecting a callback
        pr_info("Queue item already exists, handled correctly.\n");
    } else {
        pr_info("Item queued or error occurred.\n");
    }
    return 0;
}

static void __exit poc_exit(void) {
    pr_info("Exiting PoC.\n");
}

module_init(poc_init);
module_exit(poc_exit);
MODULE_LICENSE("GPL");

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-43022
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-43022
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-43022/
[4] VulDB https://vuldb.com/cve/CVE-2026-43022
[5] https://git.kernel.org/stable/c/0ad2ce230b38cd4b3f6732cc609e270461e626e5
[6] https://git.kernel.org/stable/c/2969554bcfccb5c609f6b6cd4a014933f3a66dd0

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-43022", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "published": "2026-05-01T15:16:46.483", "lastModified": "2026-05-08T14:53:58.163", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hci_cmd_sync_queue_once() return -EEXIST if exists\n\nhci_cmd_sync_queue_once() needs to indicate whether a queue item was\nadded, so caller can know if callbacks are called, so it can avoid\nleaking resources.\n\nChange the function to return -EEXIST if queue item already exists.\n\nModify all callsites to handle that."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.19.12", "matchCriteriaId": "69EBA763-2018-43A0-9E04-A217634DDECB"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.1.120:*:*:*:*:*:*:*", "matchCriteriaId": "52A2191E-D354-4732-9A39-C4059434873F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.6.51:*:*:*:*:*:*:*", "matchCriteriaId": "C599A8CC-8612-442F-9C8A-A2AC38388756"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:6.8.9:*:*:*:*:*:*:*", "matchCriteriaId": "76C237AC-883E-439D-8ADF-3ABB51821E39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0ad2ce230b38cd4b3f6732cc609e270461e626e5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}, {"url": "https://git.kernel.org/stable/c/2969554bcfccb5c609f6b6cd4a014933f3a66dd0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"]}]}}